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@proceedings{1205737,
author = {Šperka, Jiří and Schafer, Jan and Hnilica, Jaroslav and Kudrle, Vít and Gott, Gregor and Foest, Rudiger},
booktitle = {XXII Europhysics Conference on Atomic and Molecular Physics of Ionized Gases (ESCAMPIG)},
keywords = {filament instabilities; image processing; striations; bifurcations},
language = {eng},
title = {Non-thermal Atmospheric Pressure Plasma Jet Operated in Krypton and Argon: Visual Characterisation of Discharge using High-speed Camera},
year = {2014}
}
TY - CONF
ID - 1205737
AU - Šperka, Jiří - Schafer, Jan - Hnilica, Jaroslav - Kudrle, Vít - Gott, Gregor - Foest, Rudiger
PY - 2014
TI - Non-thermal Atmospheric Pressure Plasma Jet Operated in Krypton and Argon: Visual Characterisation of Discharge using High-speed Camera
KW - filament instabilities
KW - image processing
KW - striations
KW - bifurcations
N2 - Plasma filament instabilities have been visualised using high-speed (HS) camera (REDLAKE MotionXtra HG-100K, repetition rate of 10 000 frames per second) in a radio-frequency (RF) capillary nonthermal atmospheric pressure plasma jet (ntAPPJ [1, 2]). Only the RF power (27.12 MHz, 14-90 W) and the gas flow have been varied; the outer capillary of the ntAPPJ has been fed with argon (flow rate between 600-1200 sccm), or with krypton (flow rate of 50-600 sccm). HS images are compared with long-exposure photographs of the active plasma zone (exposure time 6 ms, Panasonic Lumix FZ 100). This study reveals the wide variety of filamentary discharge structures present and describes the occurrence of striations, which occur mostly during transitions between stable modes (see mode diagram for krypton). Image processing has been used to unveil the complex behaviour of contracted filaments, both in time and space; particularly splitting of the laments. Moreover, other observed phenomena are highlighted, especially moving striations and bifurcations.
ER -
ŠPERKA, Jiří, Jan SCHAFER, Jaroslav HNILICA, Vít KUDRLE, Gregor GOTT a Rudiger FOEST. Non-thermal Atmospheric Pressure Plasma Jet Operated in Krypton and Argon: Visual Characterisation of Discharge using High-speed Camera. In \textit{XXII Europhysics Conference on Atomic and Molecular Physics of Ionized Gases (ESCAMPIG)}. 2014.
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